Character recording system



N0V 5, 1940- T. E. TORKELSON 2.220.500

y CHARACTER RECORDING SYSTEM l Filed Aug. 3, 1938 9 Sheets-Sheet 1 FIG. 1.,

ABCDEFHIJKLMNOPQRSTUVVIXYZ 0123456785 4 I] [1 D E l] A TORNEY Nov. 5, 1940. T; E, TORKELsoN CHARACTER RECORDING SYSTEM Filed Aug@ 5, Y1958 9 sheets-sheet 2 J zj yam/TOR. BY u I ATTORNEY Nov. 5, 1940- T. E. ToRKELsoN 2,220,500 .Y

CHARACTER RECORDING SYSTEM 9 sheets-sheet 4 i g @i `T. E. TORKELSON CHARACTER RECORDING SYSTEM Filed Aug. 3, 1938 Nov. 5, 1940.

AT'TORNEY NOV 5, 1940 T. E. 'roRKElso-N `CI'RAC'I'ER RECORDING SYSTEM Filed Aug. s, 195e 9 shetS-sneet 5 6 1,/ m a m. L .M mm@ /T/ ,w n y 2 7 4 9mm 3 6 W A W w, m V ,0, 2.|.l. ,m w r m W `u u V L g L H J TTORNEY Nov. 5, 1940, T. E. ToRKELsoN CHARACTER RECORDING SYSTEM FileaAug. s, 1958 K 9 Sheets-'Sheet 6 FIG. 13a` FIG. 9A.

INVENTR. M

ATTORNY NGV- 5, l940 T. E. ToRKl-:LSON 2,220,500y

CHARACTER RECORDING SYSTEM- Filed Aug. 3. 193s lsaysheets-shee' 7 FIG. 1o.

A TTORNEY BYy NOV- 5, l940 T. E. 'roRKELsoN- q 2,220,500

CHARACTER RECORDING SYSTEM Filed Aug. 5, 1938 i 9 Sheets-Sheet 8 t/ Y INVNTAOR Qn/ NOV- 5, 1940- k T. E. ToRKELsoN 2,2205@N CHARACTER RECORDING SYSTEM Filed Aug. 5, 1938 9 Sheets-Sheet 9 ATTORNEY Patented Nov. 5, 1940 UNITED STATES PATENT oFFIcEQ. a

l 2,220,500 .CHARACTER RECORDING SYSTEM TorkelE. Torkelson, Baldwin, N. Y., assignor'to n International Business Machines Corporation, New York, N. Yi, a corporation of New York Application August 3,

7 Claims.

The present invention relates to character recording systems .wherein code signals are initiated in accordance With the data representations disposed on individual control records to control the character or data recording mechanism.

One of. the objects of the present invention resides in the provision of means `whereby the coded data representations disposed in columnar areas or -elds are presented successively to a sensing station Whereat the representations are sensed simultaneously to initiate controlsignals comprisingcode groups `of impulses initiated successively for controlling .the operation of. the character registering or recording means.

5 Another object of thevpresent invention resides in the provision of means vwhereby the .columnar data on the control record is sensed simultaneously to initiate successively code groups of impulses of varying characteristics which are impressed upon a single transmission channelto control the character recording means thereby.

Another object of the present invention resides in the provision of means whereby combinations of control impulses-of varyingrcharacteristics are initiated, Which impulses bear a denite and predetermined relationship to the characteristics. of a system conditioning impulse initiated for each character or data representation sensed, the characteristics of said conditioning impulsebeing 0 constant or similar for each data representation.

Inv accordance with this provision, the signal receiving and selecting circuit arrangement is rendered operative only upon receipt ofthe system conditioning impulse, and in additionjthereto providing the characteristics of the said. impulse are equal tothe predetermined values assigned thereto, that is, the receiving arrangement is adapted to remain unresponsive to the code impulses in the event the systemconditioning impulse characteristics are not Aof the proper predetermined values. f

Still another object of the invention resides in the provision of means wherebyl they signal' receiving arrangement is rendered operative upon receipt of the system conditioning impulse and eiective to select individual signaling channels progressively in accordance with thesuccessively received control impulses having varying characteristics. l l 1 Still another object of .the inventionis the provision of means whereby the selected control circuits at the receiving station are maintained energized after the cessation of the selecting signals and rendered deenergized uponrreceipt of the following selecting signals.

1938, serial No, 222,851 y (C1. 17a- 17) v Still another object of the invention isv theprovision of a plurality 'of electric discharge devices and means to renderthemoperative in a predetermined progression upon kreception and in accordance with the code impulses of varying characteristics and maintain the selecteddevices` operative until receipt of thelfollowing selecting signals. a l

In order to attain the objectsv set iorth,fone method is shown in *thel accompanying embodilo ment of thejpresent invention,fwhiclr1 is merely by way of villustration of a method employing the teachings of the invention, and comprises sensing simultaneously the data representations disposed in different columnar areas on the control record 15 successively to initiate successively code Aimpulses of varying electrical magnitudes and impressing the selecting signals upon a single channel transmission medium to control fthey operation of a receiving system in accordance kwith the code impulses to select different control circuits which in turn control the operation `of the'chara'cter Vrecording mechanism. f `Provision is made whereby the individual control records are presented automatically to the sensing unit an'dvto render inoperativev the sensing and transmitting .circuits at the timesvv the' control records are presented to and ejected'fromA the `sensing unit;4 that' is, means are provided Wherebythe sensed record lis ejected and followed immediately by the feeding of a new control'recl yord into a position'txbefsensed successively' by columns. Upon positioningof the control record inthe rst co1umn position, the sensing andl transmitting circuitsare rendered' operative and maintained so vduring the successive columnarl sensing of the record. A

For each of the character or data designating Yrepresentationssensed code impulses of varying n electrical magnitudes are initiated and preceding each group of code impulsesa common system conditioning impulse of constant and predetermined magnitude is initiated for each'character representation. The selecting circuit arrangelment at the receiver is rendered operative upon receipt of the said` conditioning impulse, only when thevalue thereofnis equivalent to the predetermined electricalmagnitude assigned' thereto. AReceipt of l the selecting code impulses is` then eiiective to rendereleotric discharge devices operative progressivelyy depending upon the'electrical .magnitudes of the vselecting impulses. kControl VAcircuits for the character recording .meansare selected by theoperated devices and are adapted to be maintained energized upon the 'cessation 55 sof of the selecting impulses. Certain of the selected control circuits are deenergized only upon receipt of the succeeding selecting signals, thereby maintaining, the character recorder conditioned in accordance with the last character selection effected until the receipt of the next character selecting signal.

In the drawings: Fig. lisa detail of a data control recordhaving coded data representations disposed thereon.

Fig. 2 is a plan view of the record sensing unit.

Fig. 3 is a partial side elevationof the sensing unit, broken away to show some of 'theinterior mechanism.

Fig. 4 is a partial central section of the sensing unit.

Fig. 5 is a sectional view of the sensing unit showing the sensing brush arrangement.

Fig. 6 is a detail view of the escapement mechanism of the sensing unit.

'Figs` 7 and 8v are detail views showing the record ejecting'mechanism. v

' Fig. 9 is a circuit diagram of the signal trans mitting arrangement.

Fig. aus a detan view of the transmitting distributor clutch mechanism. n l

Fig. 10 is a circuit diagram of the signal receiving arrangement. y

Fig. `11 is a side elevation view of the character recording mechanism.

Fig. 12 is a sectional view of the recorder taken alongtherlines I2-I2 `of Fig. .11. Fig. 127A is a detail view of a stop/bar.

Fig. '13 is a detail section taken along the lines I3-I3 of Fig. 12; I y.

Fig.`14 is a. detail section taken along the lines l4-I4 of Fig. 12. Y

- Data vcontrol record 4,0V Referring now to Fig. 1, the data ycontrol record generallydesignated 20 is shownto comprise a well known tabulating machine record' card of the type quite commonly used in' the Hollerith electric tabulating systems.k Differentially positioned control representations, such as perforatons, are used to represent the various data and n character designations; The perforations are differentially positioned, in various columnar areas or fields of the record card, and by the differential positioning thereof Ydifferent data values are imparted thereto. It is seen that the letters of the alphabet are designated by pairs of control representations or perforations, each perforation of a pair being located in one ofthe twelve index point positions of a columnar area or e1d. Commonly, the index point'positions indicated as R and X are referred to in the tabulating `sys tems as the twelve`and elevenfuindexy point positions respectively. The character code shown in Fig. 1 is quite an arbitrary one and Adiiferentwell known codes which have been Vus'ed maybe employed in the present recording system.v It will be noted by reference to the code in the figure that the alphabet is divided into three groups'. The letters of the first groupA to I are designated by different combinations'of a perforation in the Rindex point position with perforations in the one to nine index 'point positions. f'I'he letters of the second group J to R are designated by perforations in the X position and combination of perforationsin the one to nine positions, while the letters of the third group S to Z ,are identified by combinationsof a O perforation with perforations in the one to eight index point positions.

The individual numeral characters are represented by a single perforation'in the corresponding zero to nine index point positions. The record cards may have as many columnar areas for the reception of the data indications, such as the perforations 2l, as may be desired. The description to be set forth hereinbelow relates to mechanism commonly used in tabulatingV systems employing the standard eighty column record card.

Record sensing unit Record card feeding mechanism-Referring now'to Figs. 2 to 4, the record card feeding mechanism shown is similar to the card feeding mechanism disclosed in the U. S. Patent 1,914,263; 15 therefore, the following brief description thereof is deemed sufficient.

The cards are fed from the supply hopper 22 by picker knife 23 which advances the cards to present their first columnar areas or fields to the Wi sensing position. In thisposition card carriage pusher 24r and forward guide 25 engage the cards and advance them step by step under control of a well known form of escapement mechanism. Pusher 24 and guide 25 are carried by an escape- 25 ment -rack`26, and' picker knife 23 is carried by a rack bar 21; Rack 26 has a gear- 28 meshing with its lower edge, 'and bar 21 has a gear 29 meshing with its lupper edge, both gears being mountedon' a cross shaft 30. VDue to this con- 30 nection between the elements, movement of picker 23 toward the left as'viewed in Fig. 2 isaecompanied by lmovement to the right of pusher 24, and this action will deliver af'card from the bottom of the hopper 22 to the sensing position 35 where thev pusher engages it for further advancement-` under control ofthe escapement mechanism. A one-way lclutch vmechanism generally designated at 3l in Fig. 3 permits the immediate returnto the left of bar 21 and picker 23.

Shaft 32 is adapted to be rotated by suitable gearing generally designated 33 which in turn is driven by a suitably disposed motor 34. Se-

-cured to-one-en'd of the shaft 32 is a ratchetshaped clutchfelement 34. Loosely mounted on Lthe `shaft 32 is a gear a5, meshing with teeth 45 on the lower edge of vthe rack bar 21, and on whichA gearY is mounted 4a disk 36. Pivotally mounted on the disk 36 is a Vsuitably toothed clutcharm 31, the free end of which is connected to latoggle plate 38 which cooperates with a ing action, the control' magnet 40 is provided `With,and when energized attracts, an armagage the newly fed card. A-t the termination 65 of the counterclockwise movement of gear 35,

a tail of arm 31-Will strikethe projection 43 secured to a fixed vplate to effect disengagement of the clutch arm and the ratchetv 34. Gear 35 and rack bar 214 are' returnedr to the position 70 indicated in Fig. 3 through a gear 44 connected to a spring barrel not` shown." The one-way clutch 3l permits such action without effecting theV escapement rack 26.` Also secured to armature 4l is an arm 45, the free end of which u lspring-urged rod 39'.V In order to eiect clutchis adaptedto operate contacts46 and 41 when the magnet 40 is energized. The contacts are maintained in shifted position by latching bell crank 48, a lug of which is adapted to be engaged by a bent-up plate 49, secured to gear 35, at the termination o f the driving movement of the latter. f

Carriage escapememt YTriehamsm.--Refe'rring' larged openings in steppingdog 55 and --locking dog 56. When the rod 52 is rocked,l varm53 will through itsv associated pin lift the stepping dog v55 out of one of the notches in the rack 26 and at the same time arm 54' will depress locking dog 56 into a notch betweenthe rack` teeth. At this time a spring 51 advances ythe loosely pivoted dog 55 a short distance but suicient to permit this dog to move above the to'p of the next tooth. When the locking dog is again raised, the stepping dog 55 due to the movement of the rack.26 will ride down along the next tooth until it strikes the end thereof. when the carriage is thereby arrested. The usual spring drum (not shown) is provided to bias the rack 25 toward the left as viewed in Fig. 5. 4In Fig. 6

the rack 26 is shown to carry a plate 60 adapted to engage and rock a lever 6| pivoted upon a fixed member of the machine when the last column of the card is in the sensing position. This lever, when so rocked, operates the contacts 62 to B4. i'

In addition thereto, theraising of the dogs 40 55 and 56 will rock a member 65a cooperating with the contacts 6B to operate these contacts each time theescapement mechanism is operated. In Fig. 4 the card guide 25 is provided with a vertical finger 61 -of insulating material which, when the new card is in position to be sensed in the rst column, will abut and close contacts 68. A space key 69 shown in Fig. 9

is provided to effect an operation of the escapement mechanismtoadvance the card one step in the known manner. Thismechanism is not shown specifically in the drawings but `is shown in detail in the patent referred to hereinabove. The space key operates Acontact 10 whenever the said key is` depressed.

Record` card sensing mechanism-Referring now to Fig. 5, a perforated card is shown in position between the guide 25 and the pusher element 24 and as just explained ispositioned step by step by the carriagel 28 to a sensing position.` The sensing mechanism at-the sensing position referred to comprises a series-of sensing brushes 1| of which there are thirteen adapted to bear againstthe insulating conducting bar 12. .The brushes are carried by an insulatingbrush.

holder 13 secured between a pair of side plates with a yoke or'bail shaped member 14.- The latter is adapted to be rocked by the toggle mechanism indicated generally at 15 lwhich is shown to cooperate with the armature 16v ofthe magnet 11. Upon energization of the said magnet,` the bail-shaped member' 14 is elevated resulting in the contact of the individual sensing brushes 1| with the common bar 12. K brushes 1| are out of engagement with the bar except at such times when the said magnet is Thus, the

energized. Twelve of thebrushesmakecontact with the bar through thepe'rforations in the card, and the other is located beyondthe lateral edge of the card for a purpose to be funjderstood as the description progresses. Also, uponener- 5 gization of the magnet 11,the associated armature 16 is adapted to cooperate with the suitably disposed contacts `18`and 19 -to operate these contacts each time the said magnet is energized.l Record ejecting mechanism-Means' are t pro- 1o vided in thesensing unit for automatically removing the sensed cards and depositing the same in receptacles provided for this purpose; yReferring, to Figs; 7 and 8, a card gripper mechanism -is'shown comprisinga pairof jaws 80 and 8| 15 urged together by a suitable spring 82y whenthe abutmentofthe pin 83'with the upper jaw 80 is not effective to separate the jaws inorder that the punched card may be' received at'the'` slit-like separation. The card occupiesA a posi- 20 tion between the jaws at the ltermination of the sensing of the last column .of the card. The gripperis pivotally'mounted on a shaftA 84"to which is secured a gear 85 adapted tobe driven by a gear 88 through an idler gear.` Meshing l2i; with the 'gear 86 is a slidably mounted rack'81, the extremities ofl which terminate in\an adjustable cylindrical plunger 88. During the previous restoration of the card carriage, the end of Erack 21 engages plunger V88to`shi'ft r'rack 81 30 tothe left against the tension of the spring 89. This causes a clockwise movement of shaft 84 to bring the gripper unit. into-theposition shown in Fig. 7, whereupon'a-'latch lever 90 engages a shoulder 9| of the lower jaw 8|.- Shiftingtof 35 the latch lever 90 is eiected by energization of the magnet 92 which attracts its armature 93 causing a shifting 'movement of the linkage generally designated 94and by means of the camr l shoulder 95 an arm 96 secured to thepivoted 40 shaft of the latch lever 00 will rock the latter. This-resultsin the'releases of spring 89 to cause the counterclockwise rotation of the gripper unit.

As the jaw80 leaves pin 83, spring 82 willact to close upon the lower jaw 8|, thus securely 45 gripping the card and flipping the. same inl a reverse position. Y A stationary pin 91 V may suitably coact with one of the jaws to separate them, permitting the released card to fall into a recepta-l cle 98. As the card-is ejected, shiftingof ra'ck 50 81 by spring A89 causes the square shoulder 99 to Y engage and close contactsl |00.`

Operation of the record sensing unit-Referring now to Fig. 9, assume that'a supply of record cards yis disposed in a "hopper 22k and that the 55Y spacing key l|59 is repeatedly depressed until the card carriage is'in the last column position.' In this position the contacts 63 are adapted to be closed, yestablishing the' following circuiti from Aone terminal ofi the power supply by conductor 60 |0| to contacts 63,coil of relay |02, space key contacts 10, to theconductor |03 connected to the other terminalof thesource of supply, thus ,y

energizing relay |02 to close the associated contacts |04. A circuitls then completed from con- 55 ductor |0|, contacts 63, coil of relay |02, contacts |04 through the coil of magnet 92, through contacts 18 to the conductor, |03 to energize the eject lcontrol-magnet 92. It should be mentioned that the contacts 18are closedat this time, since 70 it is remembered that contacts 62 are also operlated -whenthe card'is in l:the last column position, thereby preventing the brushvmagnet' 11 from'being energized. 'Upon energization ofthe ejector ymagnet 92, the electing mechanism is r'lli rendered operative but, since no card was assumed to be in theA card carriage, ejection of a card isnot effected. At`the end Aof the stroke Vthe ejector. lcontacts |00 are adapted to be closed,

establishing acircuit via conductor 0| and contacts 63 through the control magnetv 40, coil of relay |06, through the contacts 146 to the conductor |03, to effect energization of the control magnet`40 .and relayfii. Energization of magnet 40 is effective to trip the Aclutch lever 42 tocause the clutch element 34 to rotate thegear 35. Enern gization of the magnet 40is also effective to operate the. contacts 46 and41 closing'the con- .tacts 41 toestablish a circuit through .the card feed motor 34. Thereuponthe operation of the said motor and the associated gears is effective to cause the rack 21 to be displaced to advance a card frornthe hopper and, presenting the first lcolumn thereof tothe sensing position. At the 'end of the feeding stroke, the contacts 46 and 41 o are adapted to be"r restored .to the normal posivtionshownin Fig.'9 causing relay. |06 to be deenergized and permitting the contacts .|05 to be closed.` Upon displacement of the f rack 26 the last column position contacts 62 to 64 are restored to the normal positions shown -in the iigat the sensing brushes and the contacts 46 are again closed, a circuit is established from yconductor |0| through .the said contacts, through the coil of magnet'11, contacts 62, and contacts |05 to the conductor. |03 to energize the brush magnetg thus elevating the brushes 1| to engage ed to be closed when the first columnof the card is presented to the sensing position. Upon closure ofv the said contacts, a circuit is established through conductor 0| through the said contacts and through `the magnet |01 to conductor |03, energizing the magnet |01. A holding circuit for the said magnet is established through the associated contacts |01a now closed and through the contacts 64`to maintain the magnet energizeduntil the last column of the card is sensed. Energization of the said magnet v(see Fig. 9A) is effective tocontrolthe armature |08 causing the latching lever |09 to release the pawl ||0.and disk-.IIL .Spring urged pawl ||0 is then permitted to engage a tooth of the ratchet ||2 which isksecured to the shaft I3 which in turn is continuously rotated .by the motor ||4 (seeFg. 9). Disk rotatably mounted on shaft I3 is now caused to rotate with theratchet ||2. An insulated arm ||5 fixed to disk carries interconnected conducting brushes ||6 which in turn are adapted to engage the individual conducting segments ||1a to ||`|c and I9 disposed on the commutator H9. The method of initiating successively controlled impulses will now be explained.

`ments ||1a to |I1c. a adapted at .certain times to engage the conduct- Impulse transmission system- As soon as the card is properly positioned ing bar 12 areshown to be connected to a potentiometer arrangement |2| so that upon engagement of the individual brushes vwith .the conducting bar 12 different electrical magnitudes, such as current values, are adapted to be impressed upon the transmission channel or medium indif cated by the reference characterL. Let it be assumed that the lowest value of current is impressed upon -the line by the brush. disposed farthest to the right-as viewed in Fig. 1 and engaging the conducting portion 12d of the conwhich is connectedfto the second conducting segment ||1b of'the commutator .|I9, areadapted when engaging the contacting bar to impress different and stillgreater current values upon the transmission medium L, the purpose of which will be .understood as thefreceiving circuit ar- .rangement is described.

Now let it be assumed that the perforations in the first column of the cardr when presented to the sensing position aredisposedso as to represent the character N. By referring to Fig. 1, it is seen. that the `code for the character N comprises a perforation in the X index` point position and the 5 indexl point position. Also assume that the distributor arm |I5-'has'just been released due .to energization of magnet '|01 so asv to yengage the first conducting segment |1a of the commutator I9. It is now seen that a circuit is established from conductor |0| through the potentiometer |2|, the last brush 1|, the associated conducting portion 12d of the conducting bar 12, conductor |25, to the first segment ||1a of the/commutator H9, brushes ||6, common conducting segment I IB, conductor I26,.to a suitable impulse transmitter generally designated |21 and the conductor |28 which is connected to the conductor |03 through the nor- 'mally closed contacts 66 and |05, thus impressing a signal of a particular value `or magnitude upon the transmission medium L. Whenever the transmission medium is ametallic conductor, the

differentiating characteristics of the vimpulses may be in the.diferent'current values of the impulses impressed upon the line. If well known types of'electronic impulse transmitters are employed, the differentiating characteristics' of the impulses impressed upon the medium L may be one of signal amplitude.= The first signal of each combination of impulses krepresenting a character will be referred to herein as a system conditioning impulse. This impulse is always initiated through the first conducting segment4 |1a of the commutator and isalwaysof the same current value or electrical magnitude. The differentiating characteristics of the impulses, such as the different ,currentl values referred to, will be referred to from time to time as signals or signal impulses of different or having varying electrical magnitudes. It will be understood that the different current values or current strengths or its equivalents are referred to whenever. this exg pression is used. UponA advancement of the rothe commutator to impress `a signal or impulse of different magnitude upon the transmission medium L due tothe following circuit now established: from conductor potentiometer I2I,A

conductor |28 which in turn is connected to the other terminal of the supply source by theconv ductorV |03 through the normally closed contacts 66 and' |05. A third impulse of still different magnitude is impressed upon the transmission medium L as the brushes A| I6 are advanced to engage the i third conducting segment ||1c of the commutator. By means of the'described potentiometer circuit an impulse of a predetermined l ever a perforation occurs in thesaid column of magnitude is initiated through the brush 1| sensing the perforation at the 5 lndexpoint po- "sition and engaging the conducting portion 12e of conducting bar 12 which is connected to the third conducting segment ||1c by conductor |30" andthus impressed -upon the transmission medium. l p It is to be noted that the conductorl |30 also is connected to a coil of'relay |3I, the other terminal of which is connected by conductor |32 to one side of the terminal of the supply source 5 `by means of conductor |0I, This circuit is energized whenever any' of the vbrushesf-1| sense a perforation in the one to nine :index point positions. Energization of lthe relay' |3| causes the contacts |34 to be closed and thecontacts |33 to be opened. This arrangement is provided so that, in the event that a kperforation occurs with any of the one to nine index point positions, y

in the zero index point position in combination the impulse initiated by the zero brush 1| is transmitted by means of the second conducting segment ||1b of the commutator. However, in the event that the zero digit is represented by a perforation in the card as a single perforation,

it willthen be necessary to transmit the impulse initiated by the zero brush by the'third conducting segment |1c of the commutator, and at such times, ofcourse, it is obvious that perforations will not occur in the one `to nine index point positions,l thus rendering the relay |3| inoperative" so as to permitvthe contacts |33 to be closed and connect the conducting portion 12b of the bar 12 which is engaged by the Azero brush 1| tothe |31 to the coil of the escapement control magthird conducting segment |I1c of the commutator.`

In this manner the character impulses of varying magnitudes are initiated and impressed Vupon the transmission medium L. After initiation of 1 the said impulses, the brushes ||6 are advanced to engage the segments |35 and '|36 to establish a circuit asfollows: from conductor |0,| to segment H36, brushes ||6, segment |35, conductor net 5,0, contacts 19 to conductor |03, energizing the said magnet 50 effecting escapementof the carriage to position the next column of character perforations to the sensing brushes, where-A upon the character signals will be initiated and impressed upon the transmission medium in a mannei` as just described. y

.The character signals comprising impulses of varying electrical magnitudes are initiated and impressed successively upon the transmission me- Y dium for each of the columns on the card having character data disposed therein in the form of perforations. Upon sensing and transmitting the character signals of the data disposed in the last column of the card, the contacts 62 Vto 64 are operated'by the card carriage to open the brush magnet 11 circuit andthe holding circuit 'for the control clutch magnet |01. Closure of contact 63 causes the ejecting control magnet 92 to be energized, thus ejecting the sensed card and causing the feed clutch magnet 40h`to be energized during this operation and alsoI causing a new card to be introduced atthe sensing unit and positioned so that its iirstcolumn is disposed at the sensing station'. `When the said card is thus positioned, the first columnfcontacts 68 are closed to lagain energize the' control magnet |01 to release-'the'rotary brush arm- I5 and by means of the contacts 46 now closedfthebrush lmagne't- 11 is energized to position the brushes 1| so as to engage the conducting bars 12*l whenbrush 1| constantly engaging the conducting vporl tion 12d of the conductingv bar which-in turnis connected to the rst segmentV ||1a of the commutator. This conditioning impulse is the'inipulse having thelowest electrical magnitude of the different groups of impulses initiated; l-Let it be assumed that the electrical magnitude of this impulse is equal to one unit andthe electrical magnitude of the impulse initiated by the brush 1| adapted to sense'theperforations at the :nine

` index point position is equivalent to'two'units, the next brushv to the left thereof at the' eight index point position initiates an impulse ofy electrical magnitudeof three units, etc. Inf this manner it is seen: that the brush sensing thefzero index point position initiates a signal of electrical magnitude equal to feleven' units, Vthe X.

brushtwelve units and the Rbrush thirteen units.

The purpose of this arrangement will become `obviousduring the description of the receiving circuitarrangement which will now bek described.

Referring now to Fig.VA 10, theimpulse receiving circuit arrangement is shown to embody aplurality of electron dischargeldevices T-,,|, to'T-s-IS,

t the control grids of which'are allconnected to a common circuit associated with. any suitable known `type impulse -receiver generally designated |40. The said discharge devices are of the well-knownthyratron type ofvtubes, the characteristics of which are suchlthat :the tubesrej 55 -so conditioned as toA overcome the normalbias impressed thereupon `toA `permit thef tubes Ato .be-

main non-conductive untilv thefgridicircuits are come conductive. `irrespective of the conditions impressed upon the controll grids, once the tubes are rendered conductive' the vsaid control'grids.

effect'noffurthe'r control overl the operationof 1 the'tubes. In'the instantiapplication the'y anode f circuits of the tubes are'opened to renderfthev tubes non-conductive at predetermined-timed'intervals during the operation l of the receiving system.- The ygrid biases of the tubesfT-i to T|3 are so arranged'that upon reception vof a signal of electrical magnitude ofone uni-t, the tube T| is rendered 'conductive,- fthat 'y is, the

' normal grid bias impressed upon the tube'- is overcome. when a signal offfthisr magnitude is impressed upon the grid/circuit of this tube. Tube T-"2 is similarly arranged so that the effects of the grid bia-s are adapted to be overcome by a l Regarding the tube T-YI |A, the grid bias on this tube is of such value that signal impulses of the eleventh magnitude are effective to operate this tube as well as the tube T-I-l. The reason for this will be understood presently.

lA Now to continue with the example chosen in connection with the impulse transmitting system,

assume that the rst impulse which, vas mentioned hereinabove, was designated as thefsysc tcm conditioning impulse is received by the transmission medium Land impressed upon the impulse receiver |40. This impulse is impressed `upon the common conductor |4| connected to the Y grid circuits ofthe tubes T-I to T|3 to-overcome the conditioning of the grid bias of the tube `2li T-I, thusrendering the said tube conductive.

, `It is understood that the remaining tubes remain ,unaifected and thus continue to be non-,conductive.. The following circuit is established upon operation of the tube T| from one terminal 50 of the batttery 42, the cathode and anode of tube T-I to the coil'of relay |43, normally'closed contacts |44 of relayA |45, conductor |46, through the normally closed contacts 41 to the other terminal of the said battery, thus energizing the 35, relay |43, opening the contacts |48 and closing contacts |49 and |50. Through the contacts |50 a circuit is established from one side of the bat# tery |42 therethrough to the coils of relays |5| and |52, through the contacts |41 to the other side of the said battery, energizing the said relays. However, the relays |5||52 are so adjusted and timedas not to be suiliciently energized so as to be eilective to operate the associated contacts until shortly after the-receipt of the second im- 4.5 pulse, the reason for this being that it is necessary according to the present organization of the receiving system to maintain the output circuits of the non-conductive tubes T-2 to T-I open,

until the timed interval for the reception of the 50 third impulse. The said output circuits of tubes.

.iT- 2 to `l.'-|| are shown connected to contacts |55, so that as long as the said contacts are open,

tubes T.-2 to T-i'l cannot be affected irrespec' tive of thermagnit'ude of the `signals impressed upon the impulse'receiver.

since relay |43 and tube T-l remain operated :until contacts |41are opened.- 30y A Now assume that the second impulse is received ..which, as mentionedhhereinabove, is initiated by the X brush sensing la perforation in the X index point positions, and, as mentioned hereinabove, this impulse is of the twelfth magnitude, and therefore vis effective to. operate tubes T-IIA and T|2, since this signalvalue is suihcient to .overcome the effects lof the grid bias on both of these tubes, establishing a circuit from one side of the battery |42 and byl means of conductor |51 through the cathodes and anodes of said tubes to the Ycoils of solenoids S|, S-2 to conductor |55 to contacts |49 and |41 to the other side of said battery, thus energizing the said solenoids. The said circuits just described are maintained T5 energize until the normally closed contacts |41 Opening of contacts |44 of relay |45 prevents operation of tube T-I A uponreception of any of the following impulses,v

- are opened, which is eii'ected mechanically after printing has been eiected.- 'I'he operation etlected bythesaid solenoids will be explained when the. recording ydevice is described later herein.l Sincecontacts |55 are open, tubes T-2 to T.-|| 5 are notaifected bythe saidsecondimpulse.y

Immediately after receptionof the said second impulse and yenergization of solenoids S-,| and S-2, the relaysr |51v `and |52 are energized sufcientlyto closethe contacts |53, |54 and |55, 10

respectively.` Now upon receiptof the thirdim- Apulse which is lof the fifth magnitude, tubes T-2 A, tol T-5 are rendered conductive to energizey the ,following circuits: from thebattery |42 to the i5 conductor |51, cathodes and anodes of tubes T-2 to Tv-5, coils of relays .Rf-2 to, R5, contacts Rf-2b to .Rf-5b, common conductor |1I, contacts I 55, to thesaid battery, energizing the said relays.

The P.-2a to lla and Rv-Zb to IIb contacts are '20 of` the make before vbreak type as shown; therefore, upon energization of the R-2 to RL-ll relays the anode circuits in which the coils of the said relaysare included are transferred from the said` li, rcontacts to the "a contacts without breaking the anode circuits. Thus, it is seen upon energization of relays R-2 to R-5 the tubes T-v2 to T5 still remain conductive to continue ,to energize the coils of the relays through the following `circuits: from battery |42, conductor 30 |51, cathodes and anodes of tubes T-,2 to T-5,

coils of relays lit-42 to R-5, contactsv 12J-2a to Bft-5a, conductor |12, contacts |54 to the battery |42, thus maintaining relays R-2 to R,5 energized." ,f 35 It should be mentioned here that. closure of contacts |53 establishes a circuit therethrough to energize the coil of relay |53a, which is of the slow to energize type, and is adapted to be eil'ective to close ythe contacts |53b, for purposes to be o set forth later, immediately after the energization and operation of one of the solenoids of .the group |0| to |10. f f The associated transfer contacts generally designated R-2c to R-5c and R-ld to R-.5d are operatedupon energization o f the said relays to establish a circuit to an individual control solenoid of the group of solenoids y IBI-|10. Due to the transfer contact arrangement, it is seen that Y the control solenoid associated with the relay of 50 the highest order energized in thegroup, namely, for the example chosen relay R4-5, is .thel only solenoid energized for control purposes. For this reason since relay R-B is thehi'ghest order relay energized, the corresponding solenoid |54 is en- Lergized by, means of the following circuiti from 'battery |42 to conductor |13, through the normally closed front contacts R-i ld to R`d to vthe now closed contacts R-Sc to the coil of sohighest order relay of the group R-Z to R'|0 energized is'the only solenoid which is energized. It has now been describedhowthe printing control solenoids are selected and maintained energized, and in accordance with the example chosen tion impressed upon the receiving system.l

Assume now for the moment thatlupon selec-7 tion and energization of thesaid solenoidsthat proper character selection is effected inthe re-fcording device, and that upon completion of theA character` selection contacts |8`0are m'echanicallyf voperated by the recorderf.(this'operationwill be explained in conjunction witlithe `description of the recording unit).

from the battery |42 via contacts LV|5311",` 'now closed, contacts |80 and coils of'thesolenoids |8| andV |82 tothe battery, venergizingthe said solethe tube for further operation later conditioning signals.

Opening of contacts |56 are closed which shunt thecontacts-l|54,fthus `maintaining the said tubes yconductive to ener- Opening of contacts |53 causes 'the `relay "|"53a to be deenergized opening the associated contactsY Y |5317 thus causing 4the print and tape feed-control It Wasmentionedthatvrelay |52-"is energized suiiiciently after the receiptof the second 'impulse to operate the contacts |554 and |50.- "At this time the-operated tubes-'T-2 to T-igare ofthe signals and selection of the-relays Rf-2 Before continuing with the description of the Y recording device andthe control exercised lby impulseof the group, namely, the ksystem condithe said energized solenoidsvin:the-recorder,` it should` be mentioned that in the event the-first tioningimpulse is not of the-proper magnitude,

that is, let it be assumed that the adjustment at y the transmitter was such as toinitiate an impulse cfa magnitude greater than the tube"T-'-| is adjusted for so that under such conditions not -on1ywil1 the tube T-| of the receiver beren- 4dered conductive but the tubeT-IA will` also be rendered conductive.. Contacts y |44 Vassociated with the relay |45 are adapted-to vbe operated slightlyfaster than the contacts v|48 of relay |43. Therefore, it is seen that relay. |43 is'prevent'ed kfrom ,being energized upon reception ofa'conditioning impulse of vtoo great a vmagnitude. iIn- |49r renders-the tubes `T--I IA -and T-I 2 non-conductive thus deenergizing'the solenoids S| and S-2.' AOpening off-1! contacts |50 causes relays |5|1 and |52 Ato be der energized; however, relay |5| is adjusted to re-f4 Vlease at a slower rate than relay |52,".thusfconi' tacts are adapted to be opened a'nd contacts |56 closed before contacts .|53 -and' |54 of relay |5| are opened. The purposeufor" this arrar'ige-V ment is to provide aclosed circuit for the 'anode-' circuits of tubesT-Z to T-5 until vthecontacts stead, however, the 'frelay` |15 'n is energiaed by lmeans of Y the following circuit: from battery |42 to conductor |51 to thefcathode and anode of tube 'T-| A, coils of relays |45, |15, contacts 11s, las, andan te said" battery; Remynsis of the slow* releasing" `type and tends to r`break down the circuit just established andy described through*` coil'of relay |45 after 1 a timedfinterval equivalent tof'theftinie required-"forthe transmission of three character impulses, tl'nijsp'reventingv faulty operation offth'ereceiving system." Y 1 Upon properadjustment'of =`theff Closure ofY contacts |80 establishesfa circuit ansmittei' and receiver', normal operation ofthe circuit" is ef- "'fected which isgin accordance,Witli'the'fdescrip- Y tion set forth hereinabove. The character re-v recording unit is showrrto c'somprise ya""'s u"1 :abl`e Vtype wheel 2001 rotatably supported by shaft 20| which is rotatedv lby a" suitablyjdi'sposed' motor 202. The-'type Wheel is Aadapted to beffrictionally driven `by the Afriction disksf 203 which are supported lbythe said sh'aftf' The 'type Wheel.

stopbars4 are supported by a'fraine'generally in dicated'at-fwhich'is rotatably supported by member :201. YAs shown in Aligskl2an`d13, the

stopbars 1205 are radapted to be arranged'concentrically` with respectto `thefshaftff20 5"in the I are `adapted "to" extend through" oblong openings 208 so as to permitY movement yof thefindividual bars.205.in41both'horizontal and `vert ic'al 'direc' .tions.` Saidbars'205 are shown'to be piyoted at 200 in Fig. .f1-2 to permitl the stop bars' to move gizfe vthe relays 1?.--2l to R-5 and maintain 'the`-' selected solenoid |64 energized, even though 'c 'ontacts |54 are opened, until relay |52'isene'r`gized by a later signal impulse. f: Y 'i into. and fout 'of the path" of theV stop 204 "secured to f the typeiwheeL 'IriFi'g. vl2-theflower stop bar 205 is slioWn to be-in; a position so' aste bev out of fthe path of theA stop l2||4;-Whereas the upperstop bar is shown in a position so thatone end'th'ere- .ofextends into l the path vofV the stop 204', thus and determined bythe oblongaperturesrbpentionedi that -the frame 200 carryingv theindividual displacing the stop bar unit? with "respect tothe member 2|2 is adapted to'be positiohedbya `wbar2|3`upon which there vis disposed Yafstud 2|4' y adapted to engage" directly' lthe Tforked 'meinber oneof three positions.' r :Irithis mannen the'fstopl -barfunitvis positioned or vZoned "iri' bne' of Ythree positions'fand in this mann'rfis effective ode-'i with the rollers: v2 |'44`v Supported* by the plungers 2 |5 .of the solenoid 'assembly comprisingfthe-im '35 Aif:

eiecting'positioning ofthe type Wheel 200.' The A stop-.barsl 205 varealso -arranged to b'e r r1 ounted con :the framev 206' so that'the individual-bars can r be'.partially rotated in a horizontal plane about i-pivots 2|0. extent: of movement permitted --for=the1positioning of v'thev said barslin b'thfthe 4horizontal and vertical directions is lcontrolled ings120'8 referred tohereinabove.'vv lt w'as men- 55 stopbars 205 lis'rotatably supported'bythe 'niernj `fber'20`liand has secured` thereto 'a forked member xv2|2 `which is clearly showrr in Fig; 14 andljilhich ais adapted upon positioning thereof to effectfpartial'rotation or positioning'ofl the frarnef206Qthus" 60f .stop 204 on the type Wheel.' Inaccordanceyvith :the: organization off-the' invention; the f orlged .200 is provided with a'sl'litalilel stop204`which is adapted'toengage any one of the Astop bars 205 vupon displacement' of the stop bars. Theisaid 'dividual solenoids |5|-|'|0 A',.I'lie solenoid asl roller; 2|4,--.`thus causing the'associatedstop bar ser'nbly is suitably securedfto rhe framework 2|3 205 to be partially rotated about the pivot 200,

which mayform an integral part of theframe thus positioning the free end of the 'stop bar 201 as`indicated in Fig. 12. Extensions 2|3a,a 2Min-the path 204'o`f1the type wheel 200: Upon y 5f detail of which is lshown'inf`1ilg. 12A. are adapted, engagement of the stop 204 withv the stop bar 205,

to .beoi' suilicient length so that the rollers 2M the selected character disposed inthe-'type' wheel ar'e'fin'y direct engagement at ,all timeswith the 200 isY held Vin vpositionat the printinggposition extensions irrespective ofthe,position ing .of the untilirecording'thereofis eiected; -l stop bar unit, that ist he roller 2M is adapted ,-It'was mentioned that the individual stop bars lu to engagethe extension2|3aat:` alltimes, even 205werealso-adapted to vbe rotated iria?y hoxim though thestopbar `unitmay be in the first, secaontalplanef about the pivot 200.J This i'seiiectedl 'ond or thirdzoning position. Itwas mentioned as follows: As the type wheel 200 comes toy rest ymythe mmngpositionsreedected bythepo- .y 'duetol the engagement ofthe stop 20|' with thek `slitioningoi' kthe forked member 2|2which in turn wpitioned stop bar 205, the momentum of the provided with.. three dependentarms k2|?,V eachy g-stop bar 205 ina clockwise direction as viewed in ann being providedwith asloti 2| l.` Three son s Fig- 13for'a short distance as determined by7 the ing solenoids S-l to S-3 kare provided with lrectangularaperture'203.. 'I'his 'partial rotation individual pinsY 220 which are adapted to be of the bar 205 is adapted to eiect engagementof (so disposed in the saidfsiots m1 of the individualV the saidbrr witntne disk zzswhioii isroiatebiy 20 I depending k arms 2| v'L .The said solenoids S-I to supportedon the frame 205 as indicated in' Fig. S`3y are adapted to displacetheassociated .12. The disk 225 isgprovided with 'a plurality plungers 2|! different distances, that is, solenoid of; extension rlngers'lech'ofwhioh il dptd 1 S-i :is adapted upon. energization to displace the tobe directly engaged by the'associateddisplced 3 5 associated plunger 2|! tothe'right a distance, let'y ltopbar 205 When the br'i'lirled bythe type 25 un say, equivalent to that shownin Fig; 12 and wheel stop 204. Partial rotation ofthe 225 indicated, by thedesignation 4A whereas .solenoid in a ,clockwise direction is effective tocl'osei the 4 lS- 2 isadapted todisplace its associatedplunger7^ suitably? disposed contacts vlllbyineiinsof one upon energization a distance to; theV right 'as of theextension fingersy 225.1 f The eect `oi' the viewed in said figure-equivalentto the distance closure Lof contacts |80 was described in detail`30 l indicated at B and finally the solenoid=-S'-3 is in ooniunctiOn WithiFiL 10, 'and itv 4is reinemadapted to displace itsassoclated plimger a disbered itkis A the closure `of these. contacts that :en tothe right-'equivalent to the distance ineffectenergization of the printing control sole- :dioated at C. s In this menner it is seen'that the; .noid ill shown in Fig. 11. yEnergization ofthe associated br-zia 1s adapted mbefdisplced dif.. solenoid -III causes displacement of the associ- 35 ferentially depending upon. the energization 01j ated plungerr 221, thus-causing the pivotedfarm the solenoids AS-Ito S 3. Itfjin seen' thntthfe'v t 223 tobe partially rotated inaclockwise direcj ber :legis moved farthest to the right astviewed tion as viewed in Fig.' r11. urging thev printing in 11v upon energization "or -solenoid -S-J hammer 1229 secured to the free end of the'print- 4o whereas lthe ber m is movodbut onesmrd ofing arman 'against the record stripm'and 4o the distance upon .e of thesolenoid wheel 200,. thereby effecting-recording of S-L In this manner: positioning-orv zoning of o theselected character upon the vrecord strip.

the @forked member 2|2 and the stop bar unit is Upon complete displacement of the printing `arm effected.. 223,-the extension finger 23| thereof is adapted a Tneoperotion or the unitdesoribed to operate the contacts |41 which-'as described- .4s

thus far should be. quite obvious fat this point,v hereinabove, upon operation are adapted to open However, to follow `through with, the example thecontrolfcircuit so as to cause deenerg'ization` chosen earlier herein, the manner of eii'ectingony relys |43 S01n0id8 S-l Bhd' S-Z and character selection is briefly `as f ollowsz- Upon relays |5| and |52. 'I'he solenoid llis'main- `|i0 receptionof the second; impulse; it was men-A f tained energized `until a further selection is made'- 50 f now seenV that upon energization ofsaidsolenoids #ntie ,With vthe Character Signals? The Printing 00 that the bar 2|3 isladapted to be'lpogitionedftwo control magnet |3| isalso'deenergizedaswell Las 65 unitsvto the right as viewed in Flg.-,11 whichgrlet olenoid.; 32. In Fig. 11 solenoid |82 is ysho'i'ivn us assume, is equivalent to the distanoeBindi- Suitlbl! dlPOsed with respect to the armature vcated in the said ligure. Itis seen that the en- Nvted at 235, the free end of which Ycarries ergization in this particular exenipleor-soienoid the pivottpawl 236. Upon energization of vthe S-'l has no effect upon the flnal positioning. solenoid |02ithe amature 2351s attracted, thus'o the bar 2|3 whichxiscontrolled-in this case by lli'ilitfdownwrdly the pawl' [t0 ensae'the the jlenergization or solenoid S 2,` sincethel toothin the ratchet` 231. Energizationbf stroke of the associatedfplunger thereofis great- *..lvllioidxln 1B .85609811 atV theme time mit.

f er than' that of the plunger of solenoid solenoid itl is energized.y Upon-deener `0|$ Positioning of the bar 2|'3 ineffective to position girationf of `solenoid |02 'thesaid armature pawlo t the forked memberj2|2g in a c ounterclockwise is restored tothe normal position shown inFig. direction, thus displacing the frame.206 carrying liv-by. spring .233. o thus :actuating the ratchet the individual stop bars k2ll5, thereby ,eiIecting a v wheel- 231 ,and thev feedingroll 239 fixed theretoL zoning operation.- Upon-'completion oit the dej toeifect advancement or feedingnof the record 70 scribed `zoningoperationg the third selecting imstrip ya suitable distance. `.The type` wheel 2001s" 70 pulse is `receivedby the system as described hereshown to be iny 'constant yengagement with a suitinabove to energize the relaysfR-Z ytof'R `-5,;ef 'able inkingfroller 240 secured to a suitable disfecting .energization of theisolenoid |04.EnerA .posedfpivotedfarm`24l;Y Upon deenergizationof girationlotxthesaid solenoid |64 isadapted toiatoneof ythecharactei' selecting solenoids of counterclockwise direction as viewed in Fig. 13 sufficiently by the spring blades of the contacts |80, permitting the contacts |80 to be opened. In this manner it is seen that the recording unit is conditioned to the normal condition in readiness for further printing operations in the manner just described.

'I'he claims of the instant application relate solely to the selecting signal control systems; the character recording device per se is claimed in a separate co-pending application Serial No. 222,852, filed August 3, 1938.

While there has been shown and described and pointed out the fundamental novel features of n theinvention as applied to a single modification,

it will be' understood that various omissions and substitutions and changes in the form anddetails of the device illustrated and in its operation A-maynbeinade by those skilled in the art without departing from the spirit of the invention. It is the intention therefore to be limited only as indicated by the scope of the following claims.

What is claimed is:

1. A system of the character described com-` prising means to initiate code groups of impulses representing diiferent characterizations including means to initiate for each characterization a -common impulse ofnpredetermined electrical magnitude, the value of which is the same for each characterization and means to initiate additional vimpulses of different electrical vmagnitudes representing the different characterizations, the value of .the electrical magnitudes of the said last mentioned impulses bearing a definite and predetermined relationship to the constant value of the electrical magnitude of the,

said common impulse, and receiving means responsive to and controlled by all ofthe code impulses in the groups representing the characterizations.

2. A system of the character described comprisingmeans to initiate character signals consisting of code groups of impulses including means to initiate for each character an impulse of similar and predetermined electrical magnitude and additional means to initiate additional impulses of diierent electrical magnitudes representing the characters, the values of the electrical magnitudes of the last mentioned impulses and the first said impulse bearing a deilnite and predetermined relationship therebetween, signal receiving means including means responsive to 'saidl Yfli'stumentioned impulse to condition the said receiving means for reception of the said second mentioned impulses, and means controlledby the signal receiving means in accordance with electrical magnitudes of the said additional impulses.

3. A system of the character describedl comprising means to initiate character signals consisting of code groups of 'impulses vincluding means to initiate for each character one common impulse of a similar and certain predetermined Aelectrical magnitude and one or more impulses of different electrical magnitudes bearing a predetermined .relationship to the electrical magnitudes of the common impulse, signal receiving ,means including means responsive onlyl to vthe said common impulseto condition the receiving means for further reception of the additional impulses of the group, a plurality of signaling channels, and means controlled by the second. mentioned impulses to control the' selection of the individual signaling channels in accordance with the character signals.'

.4. A systen'i of the character described comprisingmeans to receive code groups of impulses, character recording means having a plurality of electromagnetic control means and control cir-` cuits therefor, means controlled by the receiving means to select and energize certain'of said control circuits land control means to control th operation of the character recording means, means to maintain the selected circuits and control means energized after cessation of said received impulses, and means to deenergize certain of said selected circuits and control means upon receipt of the succeeding code group of impulses.

5. A system of the character described compris-f ing means to initiate character signals consisting of code groups of impulsesv including means to initiatefor each character a common impulse of a predetermined constant electrical `magnitude and one or more additional impulses of different electrical magnitudes, and signal receiving means including means responsive solely to said common impulse when the value of the electrical magnitude of said impulse is equal to the iixed said predetermined value `to condition thev receiving` means for further reception of said additional impulses. l

6. A system of the character described comprising means to receive character signals con-v V sisting of code'groups of impulses, a plurality'of `\\contro1 circuits and means controlled by the receiving means tofselect lpredetermined control circuits inv accordance with the signals, charac-r terirecording means and electromagnetic control means therefor A'controlled by the selected control circuitsto *effect character selection and recording, meansftotrestore the selecting means to a] prising `means toreceive character signals consisting of code groups of impulses including -means to be controlled progressively byandinl f v accordance with the code groups of impulses received, characterrecording means comprising a plurality of control means therefor, means controlled by the progressively controlled'receiving: Y means to select certain of said control meansk rendering the character recordingmeans operative,`means to condition the said signal receiving means, upon operation of the character recording means, for further reception of thejcharacter Y signals, and means to maintain operative: the

, selected control means of the character recordf ing means Untlvreoeipt of the next character selecting signal. y

, .es ToaKELEJroaKELsoNf 

